package org.example;

import lombok.extern.slf4j.Slf4j;

@Slf4j(topic = "Main")
public class Main {

//    static int counter = 0;
    public static void main(String[] args) throws InterruptedException {
        Room room = new Room();

        Thread t1 = new Thread(()-> {
            for (int i = 0; i < 5000; i++) {
                 room.increment();
            }
        },"t1");

        Thread t2 = new Thread(()->{
            for (int i = 0; i < 5000; i++) {
                room.decrement();
            }
        },"t2");

        t1.start();
        t2.start();

        t1.join();
        t2.join();
        log.debug("{}",room.getCounter());
    }
}
class Room{
    private int counter = 0;

    public void increment(){
        synchronized (this) {
            counter++;
        }
    }
    public void decrement(){
        synchronized (this) {
            counter--;
        }
    }

    public int getCounter() {
        synchronized (this) {
            return counter;
        }
    }
}